Formulations that impart colour to hair with out incorporating p-phenylenediamine (PPD) provide another for people delicate to this chemical compound. These merchandise sometimes make the most of totally different dye molecules, corresponding to toluene-2,5-diamine sulfate (TDS) or resorcinol, to attain the specified coloration. An instance contains henna, a pure dye derived from a plant, which has been used for hundreds of years.
The importance of those different hair colorants stems from the potential for PPD to trigger allergic contact dermatitis, a pores and skin response that may manifest as itching, redness, and swelling. For these with identified sensitivities or a historical past of reactions to hair dyes, avoiding PPD is essential. The event and availability of PPD-free choices symbolize a big development, permitting people to change their hair colour whereas minimizing the danger of allergic reactions. This provides a safer and extra inclusive strategy to hair coloring.
